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Get the flags associated with the specified field in a result (PHP 4, PHP 5, PECL mysql:1.0)
string mysql_field_flags ( resource result, int field_offset )

mysql_field_flags() returns the field flags of the specified field. The flags are reported as a single word per flag separated by a single space, so that you can split the returned value using explode().



The result resource that is being evaluated. This result comes from a call to mysql_query().


The numerical field offset. The field_offset starts at 0. If field_offset does not exist, an error of level E_WARNING is also issued.

Return Values

Returns a string of flags associated with the result, or FALSE on failure.

The following flags are reported, if your version of MySQL is current enough to support them: "not_null", "primary_key", "unique_key", "multiple_key", "blob", "unsigned", "zerofill", "binary", "enum", "auto_increment" and "timestamp".


Example 1436. A mysql_field_flags() example

= mysql_query("SELECT id,email FROM people WHERE id = '42'");
if (!
$result) {
'Could not run query: ' . mysql_error();
$flags = mysql_field_flags($result, 0);

print_r(explode(' ', $flags));

The above example will output something similar to:

not_null primary_key auto_increment
   [0] => not_null
   [1] => primary_key
   [2] => auto_increment



For downward compatibility, the following deprecated alias may be used: mysql_fieldflags()